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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components Of Accumulated Other Comprehensive Income (Loss)
 
Unrealized Gains (Losses) on Securities (1)
 
Pension Loss (2)
Total Accumulated Other Comprehensive Income
(In thousands)
OTTI
 
Other
 
Balance January 1, 2017
$
2,975

 
$
27,328

 
$
(19,328
)
 
$
10,975

Other comprehensive income (loss) before reclassifications
279

 
36,307

 
(2,527
)
 
34,059

Amounts reclassified from accumulated other comprehensive income
385

 
(31,433
)
 
2,042

 
(29,006
)
Current period other comprehensive income (loss), before tax
664

 
4,874

 
(485
)
 
5,053

Income tax (expense) benefit
(252
)
 
(1,852
)
 
184

 
(1,920
)
Current period other comprehensive income (loss), net of tax
412

 
3,022

 
(301
)
 
3,133

Transfer of unrealized gain on securities for which impairment was not previously recognized
24

 
(24
)
 
—

 
—

Balance December 31, 2017
$
3,411

 
$
30,326

 
$
(19,629
)
 
$
14,108

Balance January 1, 2016
$
3,316

 
$
49,750

 
$
(20,596
)
 
$
32,470

Other comprehensive loss before reclassifications
(820
)
 
(36,057
)
 
(248
)
 
(37,125
)
Amounts reclassified from accumulated other comprehensive income
270

 
(108
)
 
2,294

 
2,456

Current period other comprehensive income (loss), before tax
(550
)
 
(36,165
)
 
2,046

 
(34,669
)
Income tax (expense) benefit
209

 
13,743

 
(778
)
 
13,174

Current period other comprehensive income (loss), net of tax
(341
)
 
(22,422
)
 
1,268

 
(21,495
)
Balance December 31, 2016
$
2,975

 
$
27,328

 
$
(19,328
)
 
$
10,975

(1) The pre-tax amounts reclassified from accumulated other comprehensive income are included in "investment securities gains (losses), net" in the consolidated statements of income.
(2) The pre-tax amounts reclassified from accumulated other comprehensive income are included in the computation of net periodic pension cost as "amortization of prior service cost" and "amortization of unrecognized net loss" (see Note 9), for inclusion in the consolidated statements of income.